I tried but couldn't find that crankshaft position sensor, the rear of engine is so cramped, all I could see was the throttle linkage and several valves on the engine block.
When you said left rear to the block, did you mean the place near to the fire wall on the passenger side?
99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.